Solenoid
available as linear solenoids. They differ in particular in the stroke-force curve (Figure E 23) and with it the switch-on time. The switch-off time is dependent on the unlocking time and the spring force
Semiconductor memory
available up to 1 Mbit. Static RAM, SRAM : The storage cells consist of bistable circuitry elements with a functionality similar to that of a flip-flop. The information is not volatile; it is stored until
Test conditions
the repeatability standard deviation. Under repeat conditions, the same systematic deviations occur with each measurement. They can therefore not be defined outside of the repeat measurement series. Conditions
Safety regulations
rules, regulations and standards of the institutions for statutory accident insurance and prevention, with some of them handled in great detail and some tackled very generally. The most important rules and
Foreword to the online edition of the O+P-Fachlexikon "Fluidtechnik von A bis Z" (O+P technical glossary "Fluid technology from A to Z")
themselves from competitors. This situation marked the terminology in fluid technology for a long time. With the O+P-Fachlexikon "Fluidtechnik von A bis Z" (O+P technical glossary "Fluid technology from A to [...] and refinement of terms and definitions. For this reason in 1995 there was a 2nd revised edition with the joint authorship of Hans Ebertshäuser (who died in 1992) and Siegfried Helduser. Here in particular
Electro-mechanical signal converters
coil : Operates based on the electrodynamic principle. It combines low hysteresis and good linearity with very good dynamic behaviour. A disadvantage is the low stroke work. Torque motor : In the rest position
Cavitation
converted into dynamic pressure (flow energy). Vortices will mainly form after cross sections widen, with static pressure falling to the critical value at their centre due to the fluid's high circumferential
Flow in pipelines
flow pattern l a = 0.03 d i · R e (for example 20 mm internal pipe diameter approx. 1.3 m) compared with just 10—20 d i for turbulent flows, most pipelines have a turbulent flow. (d i is the inner diameter
Pressure-limiting valve
that provide protection for overpressure of a Hydraulic accumulator must be designed as safety valves with unit approval. Directly controlled pressure-limiting valves : The opening pressure of the valve is
Hydraulic power pack
application, and must be configured accordingly. The extracted volume is determined in accordance with the size of the consumers and thus the overall need for fluid in the hydraulic system. The warming